Fluid-pressure-releasable lock for freight-car doors.



G. V. MOGILL.

FLUID PRESSURE RELEASABLE LOOK FOR FREIGHT GAR DOORS.

APPLICATION FILED FBB.23,1912.

1,050,556. Patented Jan. 14,1913.

INVENTOR UNITED STATES PATENT OFFICE.

J onollui vanes or union, PENNSYLVANIA.

h rcn FREIGHT-CAB Doors.

in to the accompanying'drawin'g.

This invention relates to a fluid pressure releasable lock for freight car doors, and has for its object to provide a lock of such class, 'with 'mea'nsina manner .as hereinafter set forth whereby the lock can only be released by the application of fluid pressure.

A further object of the-invention is to provide a fluid pressure releasable lock with means in a manner as. hereinafter .set forth for shifting the lock to operative position,

. drawings;

and with means whereby fluid pressure can be supplied to the lock-for releasing the same, at the same time indicating by si 'al that the lock is being released or has en released.

' i 'Further objects of the invention are to pro'videa fluid pressure releasable lock for freightcardoors which is simple in its con eflicient in itsuuse, readily set up with -respect to thecar door, and comparatively inexpensive to manufacture.

;:'With' the"foregoing andother objects In W view, thef invention consists of thenovel' constructioml combination and arrangement of parts-as hereinafter more specifically described and illustrated in the accompanying of the invention, but it is to be understood that changes, variationsand modifications can be resorted to which come within the sctipe of the claims hereunto appended.

n'describing-the invention indetail referenoe is hadto the. accompanying drawings, wherein like reference characters donote corresponding parts throughout the several views, and.in .which-.-'

Figure 1 is an elevation of a fluid pres sure releasable lock in accordance with this invention, showing the adaptation thereof in connection with a fright car door. Ei L 2 is a longitudinal sectional view of the loc Fig. 3 is atop plan illustrating the lock in 4 is a detail illustrating the retaining dew eamen... Lettb'ral'atcut. 5 Application Iebruary 23, 1812. Serial No.

struction' and arrangement; strong, durable,-

wherein is shown an embodiment connection with a freight car'door, and Fig."

Patented J an. 14, 1913. 619,340.

rice for maintaining the lockin a released position after it has been shiftedto releasedposition by fluid pressure.

Referring to the drawin characte 1 denotes a freig t car door and 2 a doo frame.

having an openin for the passage of a lock-' ing bol't5 of the ock. The hasp is of such length that it will project upon the door frame 2 within the path of the locking bolt 5 of the lock. Securedto the door frame 2 and disposed in a vertical manner is a cylinder 9 carried b a bracket not shown, the latter being fixed y secured to the door frame 2. One of the heads of the cylinder, as indi-' cated at 11, is detachably secured in positionby hold-fast devices 12-. The cylinder 9 in proximity to the head 11 is formed with a plurality of exhaust ports 13, the other head of the cylinder 9 is indicated at 14 and is cast integral with the body of the cylinder. Formed integral with that end of the cylinder '9 provided with a head 14 is a tapering extension 7 which is formed with an opening 8, the latter being. in .alinement with an opening 8 in the head '14. The extension 7 provides a chamber 15 which is independent of the chamber 16. the latter. constituting a piston chamber. The looking through the openings 8 and 8', as clearly shown in Fig. 2. r Arranged within the chamber 16 is' an expansible spring which bears against a piston 18 from which projects the locking bolt 5. The functionof the by reference Although sateifthe, lock is designed primarily for u e bolt 5 extends to thedoor 1 is a'bracket 3, v

spring 17 .is to shift the pistonhead 18 toward the head 14. so as to move the'locking bolt 5. to operative position' to extend through the hasp 4, whereby the door 1 is locked. Projecting from the cylinder 9. is a pressure supply pipe 22 which extends,'as at l 23 into the door frame 2 or. side. wall of the piston chamber 16.

When fluid pressure is supplied to the nipple 21, the latter openinginto the chamber 16 and has connected thereto: fluid piston 18 will chamber 16, the ressure acting against the orce the same rearwardly and compress the spring 17. As the piston 18 moves rearwardly, the locking bolt 5 will be carried therewith and will move eventu.-'

ally clear of the hasp 4. To maintain the spring 17 under a state of compression and the locking bolt 5 in an inoperative position, a spring controlled" ivoted arm is em loyed, said. arm is indicate at 26 and pivote as at 27, to a pin 28 carried by the head'14 and extension 7. Surrounding the pin 28 is a spring 29, the latter being connected, as at 30' to the arm 26, and at 28 to the head-14. The arm 26 extends through the slot 31 formed in the extension 7 so that the handle end 32 of said arm can be conveniently grasped by the o erator and shifted from in ront of the b0 t 5, as shown in Fig. 4. When the arm is shifted to a sltion against the end of the bolt'5 the atter is .taining it in an inoperative What I claim is:

In combination a hasp adapted to be carried u on the inner face of a door, 'a springcontro ed iston arranged upon the inner face of a our-frame and provided with a locking boltextending through said has to prevent movement thereof t e the door, means whereby fluid pressure can be supplied from a point exterior 'of' the door and frame and a inst said iston for shifting it to move t e 100 lt clear of the hasp to release the latter and a spring controlled pivoted arm ada be to be swung against the free end to sai bolt for mainsition.

In testimony whereof I a my signature in the presence of two witnesses.

GEORGE VANCE MCGILL Witnesses:

R. E. ALLEN, E. L. Pnanrs.

reby loc g- 

